soundbar keeps saying 'bluetooth connected' over and over in a loop, can't use it.

Diagnosis

The "Bluetooth Connected" loop on the JBL Bar 300 is typically caused by a handshake failure between the soundbar's internal Bluetooth module and a previously paired device. This occurs when a device (like a smartphone or tablet) attempts to establish a secure connection, but the soundbar fails to acknowledge the final "handshake" packet. Because the device doesn't receive a confirmation, it immediately sends another request, triggering the voice prompt again. This loop can also be caused by "ghost" pairings, where the soundbar's internal memory believes a device is connected, but the device itself has forgotten the pairing. This creates a conflict in the firmware's state machine, causing the system to cycle through the connection sequence indefinitely. You can confirm this is the issue if the soundbar becomes unresponsive to remote commands or if the status LED flashes blue rapidly between each voice announcement.

How to Fix It

To break the loop and clear the corrupted pairing cache, you must perform a targeted Bluetooth reset and a fresh handshake sequence.

1. Power down the JBL Bar 300 using the remote and unplug the power cable from the wall outlet for 60 seconds to drain the capacitors.
2. Plug the power cable back in and power the unit on.
3. On the remote control, locate the Bluetooth button. Press and hold this button firmly for 10 to 15 seconds.
4. Watch the LED display on the front of the soundbar; wait until you see the text 'BT CLEAR' appear. This confirms that the internal pairing list has been wiped.
5. On your mobile device or source player, go to Bluetooth Settings, find 'JBL Bar 300' in the list of previously connected devices, and select 'Forget This Device' or 'Unpair'. This is a critical step to prevent the loop from restarting.
6. Press the Bluetooth button on the remote once to enter pairing mode. The display should now show 'BT PAIRING'.
7. Select 'JBL Bar 300' on your device to establish a new, clean connection.

If That Didn't Work

If the voice loop persists after a Bluetooth clear, try these advanced recovery methods:

• Perform a Full Factory Reset: While the soundbar is powered on, press and hold the Volume Up (+) and Source buttons on the top of the unit simultaneously for about 10 seconds. The unit will power off and reboot. This resets the entire firmware state, not just the Bluetooth cache.
• Disable "Auto-Connect" on Source Devices: Some Android and iOS devices attempt to force a connection the moment they are within 30 feet. Turn off Bluetooth on all nearby devices that have ever been paired with the bar, then turn them on one by one to identify which specific device is triggering the loop.
• Update Firmware via JBL Quantum/Home App: Connect the soundbar to your Wi-Fi network using the JBL Home app. Check for a firmware update. This specific looping bug was addressed in later firmware revisions to improve the Bluetooth handshake stability.
• Isolate Signal Interference: Move any 2.4GHz wireless routers or microwave ovens at least 3 feet away from the soundbar. Electromagnetic interference can disrupt the pairing packet, causing the soundbar to think the connection failed and restart the process.

Heads Up

• Avoid pairing more than three devices to the Bar 300 simultaneously, as the memory buffer for paired IDs can become unstable, leading to these types of loops.
• If you use a TV with built-in Bluetooth, prioritize the HDMI eARC connection over Bluetooth for audio; it provides higher bandwidth and eliminates the pairing handshake issues entirely.
• Ensure the soundbar is placed on a non-metallic surface, as metal shelving can reflect Bluetooth signals and cause the "disconnect/reconnect" cycle.
• Always perform the 'Forget Device' step on your phone before resetting the soundbar; otherwise, the phone will simply push the same corrupted pairing key back to the bar.